Agent specific status messages in tui

[szmania]

Issue

When using more than one agent, show a prefix maybe or in parenthesis the agent name that the status message is for in the bottom left of the tui. eg: "Waiting for openai/agentic" could be "(researcher) Waiting for openai/agentic"

Version and model info

No response

[szmania]

Work has started on this feature. A corresponding Jira task CLI-39 has been created and is now In Progress. Development is happening on branch cli-39-agent-specific-status-messages.